<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
   <style>
    .father{
        width: 500px;
        height: 300px;
        display: flex;
        border: 1px solid black;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    .father>div{
        width: 100px;
        height: 100px;
        background-color: aquamarine;
    }
   </style>
</head>
<body>
    <div class="father">
        <div></div>
        <div></div>
        <div></div>
       
    </div>
</body>
</html>